linux-kernel - Re: [REGRESSION] MT7915E doesn't work any more with v6.9

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Date: Wed, 15 May 2024 09:40:40 +0200
From: "Linux regression tracking (Thorsten Leemhuis)"
 <regressions@...mhuis.info>
To: Oleksandr Natalenko <oleksandr@...alenko.name>,
 linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
 Johannes Berg <johannes@...solutions.net>
Cc: linux-mediatek@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 Felix Fietkau <nbd@....name>, Lorenzo Bianconi <lorenzo@...nel.org>,
 Ryder Lee <ryder.lee@...iatek.com>, Shayne Chen <shayne.chen@...iatek.com>,
 Sean Wang <sean.wang@...iatek.com>, Kalle Valo <kvalo@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Peter Chiu <chui-hao.chiu@...iatek.com>,
 StanleyYP Wang <StanleyYP.Wang@...iatek.com>,
 Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: [REGRESSION] MT7915E doesn't work any more with v6.9

On 15.05.24 09:15, Oleksandr Natalenko wrote:
> On středa 15. května 2024 8:23:35, SELČ Johannes Berg wrote:
>> On Wed, 2024-05-15 at 00:51 +0200, Oleksandr Natalenko wrote:
>>> Also /cc Johannes because of this commit:
>>>
>>> 6092077ad09ce wifi: mac80211: introduce 'channel request'
>>>
>>> On středa 15. května 2024 0:43:40, SELČ Oleksandr Natalenko wrote:
>>>> Hello Felix, Lorenzo et al.
>>>>
>>>> With v6.9 kernel the following card:
>>>>
>>>> 01:00.0 Unclassified device [0002]: MEDIATEK Corp. MT7915E 802.11ax PCI Express Wireless Network Adapter [14c3:7915]
>>>> doesn't work any more. Upon mt7915e module insertion the following splat happens:
>>
>> 6.9 didn't get commit 2f7cf3b61d85 ("wifi: mt76: mt7915: add missing
>> chanctx ops")? Huh?

FWIW, seems there was and earlier report about this that I missed:
https://lore.kernel.org/all/CAAMvbhGHe4PM5M=JJZRQ2m5_aVZ=4DPG76MT+q5qi3HA+7_wzQ@mail.gmail.com/

> Yes, you are right, this commit is not present in v6.9, and I can find it in the "next" branch only.
> 
> I can also confirm this commit fixes the regression for me.

So all we need to resolve this is to ask Greg to pick up the patch for
the next 6.9.y. release? Then I'll take care of that in a few hours,
unless somebody else does it first or I get some kind of "might be a bad
idea for now" signal from anyone.

Ciao, Thorsten